package cn.fz.demo05.repository;

import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Component
public class InMemoryChatHistoryRepository implements ChatHistoryRepository{
    private final Map<String, List<String>> chatHistory = new HashMap<>();
    @Override
    public void save(String type, String chatId) {
        List<String> chatIds = chatHistory.computeIfAbsent(type, k -> new ArrayList<>());
        if (chatIds.contains(chatId)){
            return;
        }
        chatIds.add(0,chatId);
    }

    @Override
    public List<String> getChatIds(String type) {
        return chatHistory.getOrDefault(type,List.of());
    }
}
